Horn



June 24, 1930.

M. F. ASHLEY HORN Filed April 9 1925 Patented June 24, 1930 UNITED vSTATES MERWIN F. ASHLEY, OF CHICAGO, ILLINOIS HORN Application filedApril 9, 1925. Serial No. 21,776;

My invention relates to horns for amplifying sound waves.

, The object of my invention is to provide a horn of semireflex typethat will be free from synchronous vibrations of the sounds beingtransmitted therethrough.

A further object is to provide a horn, all the parts of which may becast or molded in- V to the desired form, and easily united to provide ahorn of this type at a low cost. A further object is to provide a hornhaving a long air column in a small space.

Referring to the drawings which form a 7 part of this specification.Fig. 1 is a front elevational view of a horn embodying my invention.

"Fig. 2 is an inner side view of one half portion of the device.

Fig. is a cross sectional view of the 2 device taken on line 3-3 ofFigure 2.

The body portion of the device comprises the two parts A and Arespectively, each of which is cast or molded of suitable material toprovide a horn that will emit no audibletone due to vibration of thematerial used in its construction.

I prefer to make the horn of sawdust or shavings, or a mixture thereof,held together by a thin glue solution or other suitable eement such assilicate of soda, and molded in a form under pressure. I may however,make the horn' of any other suitable material such as china clay,kaolin, etc. or of wax composition.

A indicates the inner side wall of the side portion A and formed with aplane surface which is adapted to contact with a similar plane surfaceformed on the opposite side portion A. Both side portions A and A 40 areformed to provide a conduit for sound waves indicated by B, andhereinafter referred to as the throat, and an outlet in opencommunication with the throat, indicated by C, and hereinafter referredto as the bell. V

' The opposite sides B of the wall of the throat B therefor comprise andform a part of the inner side of the wall of the bell C as shown by Fig.1 of the drawing. In other words the throat is formed by two halfportions, in the opposed faces A of each section A, A with the exitopening located at a point in advance of the rounded end of the Eachportion A and A may be provided with holes DD-D respectively to receivedowels E which help to hold the parts together and also to position themcorrectly. The dowels may be dispensed with, if desired, when the saidportions are cemented together with strong cement.

The base portion F may be formed integral with the globular portions asillustrated, or may be formed separately and cemented or otherwisesuitably connected to the said portions. A tube G is inserted in thelower end of the throat B and projects into a chamber H formed in thebase F, to which the speaker-unit I is connected in the usual manner.The throat B extends upwardly from the tube G in a curve formed like aquestion mark, to a point above the bell C and then opens into the bellat a short distance from the inner end C there- I of as shown. The partsheretofore de- 75 scribed when united provide a complete horn which maybe successfully used.

I prefer however to cover the surfaces both inside and outside with ahard smooth enamel A which improves both the appear ance and tonalquality of the horn. A further improvement is provided by placing aglass or porcelain lining J in the bell and firmly cementing it in placetherein as illustrated. If greater amplification is desired, 85 anextension horn K, indicated in dotted lines, may be inserted in the bellin detachable relation therewith, or the lining J and parts K could beformed in one piece if de sired. By making the walls thick, and ofmaterial such as described, the tones gene-' rated by the transmittingstation are reproduced in the horn without introducing harsh ordiscordant tones due to vibrations set up in the material of which thehorn is made. it

of the bell back into the throat or passage B,

and therefore, the full volume of sound reeeived is reflected in thebell and projected directly therefrom, and all of the advantages of thereflex type of horn is provided without the defects inherent in saidtypes. 5 Having thus described my invention, I

claim as new:

1. I? horn 'cfiprisxriag a gissivdeaboilygiggi tion a'mg Vi W1 7 an T'fo o a bell "and halving "athroat forrild tlferein 10 extending fromthe lower surface of said-- body portion and opening bell at;

itsu gierside.

2. horn comprising a massive body p01? tion having thick walls andhaving a throat 15 and a bell formed thereingi portibn's of saidthroatand bell having a common wall.

'3'.;A' hdi*n compr isin' a n a'ssi ebddy portionfhaving' a throat-anda'b'ell formed th'ere; iii,- a portion of said-throat and a portion of 2said bell havin a common wall,.said throat I y *ar'rdbe'll having alining bf vitreous material a 4. 'Aihorn co rising a massive bodjportion hav-in thi c fwalls and a throat and a bell 'iorme therein atiapoint forwardly'of g th' innerend ofthebell. y 51'A horn com amassivebod per-f y tion having thic 'fwa l fs recessed t0 oi a bell andhaving a thif at formed therein ex tending .from the surface of 'said'body per aq tibii'gand opening iiitos'aidfbel l at a oint forwardly ofthe in 'fer 'end' of is'aid be l. 1

Intestnnonyewherjdf, 1,, w NT. Asn

LEY, have Sig d name to this specifica

